Security readout for executives and security teams
Plain-English summary
CVE-2023-35331 is a denial-of-service flaw in Windows Local Security Authority on multiple Windows Server versions. It is not described as data theft or remote code execution; the documented impact is service availability. Business urgency is moderate: prioritize supported server patching where authentication infrastructure or critical workloads depend on affected systems.
Executive priority
Schedule remediation in the normal monthly patch cycle, with higher priority for domain controllers and business-critical Windows servers. Escalate if unsupported servers cannot receive vendor fixes or if authentication outages would materially disrupt operations.
Technical view
Microsoft rates this as CVSS 6.5 with adjacent attack vector, low complexity, no privileges, no user interaction, and high availability impact. The affected list covers Windows Server 2012 through 2022, including Server Core variants. The source bundle does not describe root cause, packet path, prerequisites beyond CVSS, or proof-of-concept details.
Likely exposure
Exposure is most likely in organizations still running affected Windows Server 2012, 2012 R2, 2016, 2019, or 2022 builds. CVSS indicates adjacent-network access is required, but the provided sources do not identify the exact reachable service or configuration.
Exploitation context
The source bundle marks KEV as false and CVSS exploit maturity as unproven. No cited source states active exploitation. Treat this as a reliability and authentication-continuity risk, not as confirmed compromise activity.
Researcher notes
Available evidence is limited to vendor and CVE metadata. The CVSS vector is useful for scoping: AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Do not infer internet exposure, exploitability in the wild, or specific protocol behavior from the provided sources alone.
Mitigation direction
- Apply the applicable Microsoft security update from the MSRC advisory.
- Prioritize domain controllers and servers supporting authentication-dependent business services.
- Reduce unnecessary adjacent-network reachability to affected Windows Server systems.
- Check Microsoft guidance for any version-specific servicing requirements.
- Plan upgrades for unsupported Windows Server versions where applicable.
Validation and detection
- Inventory Windows Server 2012 through 2022 and Server Core installations.
- Verify patch status against Microsoft guidance for CVE-2023-35331.
- Confirm critical authentication servers are included in update compliance reporting.
- Review network segmentation around servers reachable from adjacent networks.
- Monitor for LSA-related service instability or unexpected authentication outages.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2023-35331 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Windows Local Security Authority (LSA) Denial of Service VulnerabilityCVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.